Well, I can say that today I saw the Phx Sukhoi fly with an Evolution 0.46 & 11x6 prop. Take-off was smooth and nice climb out. Vertical was sufficient for one or two rolls, but not much more. I was impressed. Other areobatics, loops were OK too. The pilot was not ready for snap rolls so can't say what it would be like there. On the knife-edge, he required some down elevator to stop the canopy tuck. There might be some roll mix required too.

Greg.